"I worked extremely hard and, as a working mom, I sacrificed so much. I just wanted to be treated equally and no different than my male colleagues," Kelley Voelker told ABC News.

Voelker, now in her mid-40s, was a vice president with the bank's securities lending desk for 14 years. In a still pending lawsuit filed in September 2011, she claimed that despite consistently high performance reviews, Deutsche Bank denied her a promotion and eventually demoted her, one of its few female vice presidents, solely because of her gender and recent childbirth.

Voelker accused the bank of promoting equally-qualified male candidates while her workplace had a "hostile and degrading" atmosphere towards women. She claimed one of her managers frequently used vulgar sexual language and another took clients to strip clubs.

When Voelker was about to go on maternity leave in 2003 with her first child, she said one superior "expressed his doubts" she would return to the company. Her discrimination lawsuit claimed her supervisors, "never took her seriously because she was a woman starting a family, and this was seen as a huge negative within the company."

In late 2009, when she announced her need to go on maternity leave with her last child, the suit claimed "her exemplary performance was further ignored and her male colleagues ensured her alienation through their actions on and around the trading desk."

When Voelker questioned a decision made by one of her superiors in fall 2009, another executive said, "I'd watch your step - she's pregnant," the suit claims. In response, her supervisor replied, "No need to tell me. I've got one at home," referring to his pregnant wife.

Another male colleague asked her: "When is your husband gonna get it together so you can stay home with the kids?" Voelker told ABC News.

When she returned from her last maternity leave in May 2010 to a "chilling welcome," according to the suit, a superior in the company "immediately" tried to persuade her to take on a more "flexible" reduced role, a request echoed by "various members of Deutsche Bank management."

In the discrimination suit, she says she voiced "strong objections" to the idea and reiterated her desire for a long-awaited promotion.

Instead, Voelker was terminated a year after filing her 2011 discrimination suit. She was the only member of her 500-person group to be laid off as part a September 2012 "reduction in force," she said.

Today's lawsuit claims Deutsche Bank "has chosen to blatantly retaliate against Ms. Voelker [for filing the 2011 discrimination lawsuit] by firing her after a campaign of behavior by company management to sideline her and induce her resignation."

In a statement to ABC News, a Deutsche Bank spokesman said: "While we take all allegations of discrimination and retaliation very seriously, we will continue to vigorously defend ourselves against these allegations."